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MosaicRegressor / LoJax (APT28)
Attributions are based on open-source threat reports. A family appearing here means at least one syscall record cites it; absence does not imply non-use.
5 syscalls cited
- NtAddBootEntry
Registers a new BOOT_ENTRY in the Boot Configuration Database (BCD) and returns its assigned ID.
- NtAddDriverEntry
Registers a new EFI_DRIVER_ENTRY in the firmware so the UEFI environment loads a driver before the OS.
- NtModifyDriverEntry
Overwrites an existing EFI_DRIVER_ENTRY identified by its ID, rewriting the UEFI Driver#### NVRAM variable in place.
- NtDeleteDriverEntry
Removes a registered EFI_DRIVER_ENTRY by ID, deleting the corresponding UEFI Driver#### NVRAM variable.
- NtEnumerateDriverEntries
Returns a packed list of every registered EFI_DRIVER_ENTRY — the UEFI Driver#### variables dispatched before the boot manager.